science chapter 11
Terms in this set (38)
an object's change in position relative to a reference point.
a system for specifying the precise location of objects in space and time.
Frame of reference
Objects move when their position changes in relation to a...
measures the path taken (How far an object moves)
___ is the change of an object's position
___ is the change in an object's position with a direction ___.
Distance can be a straight line, but ___ must be a straight line
the distance traveled divide by the time interval during which the motion occurred.
___ is achieved when an object covers equal distance in equal amount of time. (No change in Speed)
Speed can be studied in ___.
The steeper the slope the ___ speed the object possesses.
___ is always the x-axis, and ___ is always the y-axis
___ is calculated as distance divided by time.
___ Speed is the speed at a given point in time.
___ describes both speed and direction
Velocity is the speed of an object in a ___
___ is a combination of 2 velocities.
Plot graphs showing ___ on the vertical axis and ___ on the horizontal axis
The slope of a distance vs. time graph equals ___.
___ is the rate at which velocity changes over time; an object accelerates if its speed, direction, or both changes.
Uniform circular motion has ___
Acceleration is expressed as an increase in ___ (1m/s/s) or 1m/s2. It also has a direction component.
meters per second per second
Acceleration can also be a ___.
change in direction
Acceleration can be determined from a ___ graph.
velocity vs. time
The slope of the line gives the value of ___. Positive slope increase in acceleration. Negative slope decrease in acceleration.
an action exerted on a body in order to change the body's state of rest or motion
force has ___ and ___
four fundamental forces
Gravity, electromagnetic, strong nuclear force, weak nuclear force
___ forces and ___ forces can cause an object to move or stop moving
push a cart, Gravity
objects accelerate in the direction of the ___
___ forces do not change motion
___ do not cancel completely
a force that opposes motion between two surfaces that are in contact
___ friction- the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest
___ friction- the force that opposes the movement of two surfaces that are in contact and are moving over each other
not all ___ is the same
kinetic friction, sliding rolling
___ resistance also opposes motion
air, fluid friction
harmful friction can be reduced by the use of ___
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